Organically modified hybrid aerogels

Patent metadata

Field	Value
Publication number	US-9527977-B2
Application number	US-201615016629-A
Country	US
Kind code	B2
Filing date	Feb 5, 2016
Priority date	Nov 18, 2010
Publication date	Dec 27, 2016
Grant date	Dec 27, 2016

Abstract

Disclosed and claimed herein are hybrid aerogels which are compositions of tetraalkoxysilanes and bis-(trialkoxysilyl) imides that exhibit low thermal conductivities and high compressive strengths. Methods for their preparation are also provided.

First claim

What is claimed is:

1. An aerogel comprising a polymeric network which comprises a silica component and diimide component; wherein the diimide component of the polymeric network comprises a compound of Formula I, Formula II, Formula III, Formula IV, or Formula V:

wherein R is selected from an alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, aryl, aralkyl, or heterocyclic moiety, which can optionally contain one or more heteroatoms such as O, S, N, P, and Se;
A is selected from an alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, aryl, aralkyl, or heterocyclic moiety, which can optionally contain a carbonyl moiety or one or more heteroatoms such as O, S, N, P, and Se;
X and Y are independently selected from hydrogen, a halogen, alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, aryl, aralkyl, or heterocyclic moiety, which can optionally contain one or more heteroatoms such as O, S, N, P, and Se; and
B is an attachment to the silica component of the polymeric network.

2. The aerogel of claim 1 , wherein the diimide component of the polymeric network comprises a compound selected from Formula I; and wherein R is an alkyl moiety.

3. The aerogel of claim 1 , wherein the diimide component of the polymeric network comprises a compound selected from Formula III; and wherein R is an alkyl moiety.

4. The aerogel of claim 1 , wherein the aerogel has a density of 0.40 g/cc or less.

5. The aerogel of claim 1 , wherein the aerogel has a density of 0.25 g/cc or less.

6. The aerogel of claim 1 , wherein the thermal conductivity of the aerogel at ambient pressure and temperature is between 11 mW/m-K and 30 mW/m-K.

7. The aerogel of claim 1 , wherein the thermal conductivity of the aerogel at ambient pressure and temperature is between 11 mW/m-K and 20 mW/m-K.

8. The aerogel of claim 1 , wherein the diimide content of the aerogel is 25 wt % or less.

9. The aerogel of claim 1 , wherein the diimide content of the aerogel is 10 wt % or less.

10. The aerogel of claim 1 , wherein the compressive modulus of the aerogel is between 175 psi and 1200 psi.

11. An aerogel composite comprising the aerogel of claim 1 , and further comprising a fibrous reinforcement material comprising microfibers, mats, felts, woven fabrics, non-woven fabrics, fibrous battings, lofty battings or a combination thereof.

12. A porous material comprising a polymeric network which comprises a silica component and diimide component; wherein the porous material has a density of 0.40 g/cc or less; and wherein the diimide component of the polymeric network comprises a compound of Formula I, Formula II, Formula III, Formula IV, Formula V:

wherein R is selected from an alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, aryl, aralkyl, or heterocyclic moiety, which can optionally contain one or more heteroatoms such as O, S, N, P, and Se;
A is selected from an alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, aryl, aralkyl, or heterocyclic moiety, which can optionally contain a carbonyl moiety or one or more heteroatoms such as O, S, N, P, and Se;
X and Y are independently selected from hydrogen, a halogen, alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, aryl, aralkyl, or heterocyclic moiety, which can optionally contain one or more heteroatoms such as O, S, N, P, and Se; and
B is an attachment the silica component of the polymeric network.

13. The porous material of claim 12 , wherein the porous material has a density of 0.25 g/cc or less.

14. The porous material of claim 12 , wherein the thermal conductivity of the aerogel at ambient pressure and temperature is between 11 mW/m-K and 30 mW/m-K.

15. The porous material of claim 12 , wherein the thermal conductivity of the aerogel at ambient pressure and temperature is between 11 mW/m-K and 20 mW/m-K.

16. The porous material of claim 12 , wherein the diimide content of the aerogel is 25 wt % or less.

17. The porous material of claim 12 , wherein the diimide content of the aerogel is 10 wt % or less.

18. A composite comprising the porous material of claim 12 , and further comprising a fibrous reinforcement material comprising microfibers, mats, felts, woven fabrics, non-woven fabrics, fibrous battings, lofty battings or a combination thereof.

Assignees

• Aspen Aerogels Inc
• Aspen Aerogels Inc

Inventors

• Dong Wenting
• Rhine Wendell E
• Coutinho Decio

Classifications

• C08J9/0066

  Use of inorganic compounding ingredients · CPC title

• C08G73/106

  containing silicon · CPC title

• C08J9/0085

  Use of fibrous compounding ingredients (C08J9/0076 takes precedence) · CPC title

• F16L59/028

  Compositions for or methods of fixing a thermally insulating material · CPC title

• B01J13/0091 Primary

  Preparation of aerogels, e.g. xerogels · CPC title